Fluid brake



w. FILLINGER Nov. 17, 1936.

FLUID BRAKE Filed Nov. 20, 1934 Patented Nov. 17, 1936 "5" TATES PATENTFFHCE 6 Claims.

This invention relates to improvements in braking devices for vehiclesand is particularly adapted for use in connection with motor vehicles.

The object of" the invention is the provision of a brake in which thebraking action is performed smoothly and gradually and by means of whichthe movement of the rotating element may be entirely arrested.

A'further object of the invention is the provision of a brake which isof simple and inexpensive construction and positive and reliable inoperation.

I, In the accompanying drawing:

Figure l is a diametrical section of the im proved brake.

- Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a section similar to Fig. 1. taken at right angles thereto andillustrating a portion of a vehicle wheel.

Fig. 4 is a transverse section of the control valve showinga fragment ofa fluid reservoir, and

Fig. 5 is a long section of the valve,

Referring to the drawing in detail the numeral fi'indicates the casingof the brake which is rigidly secured in a suitable manner to therunning gear or like part of the vehicle to which the invention is to beapplied. The casing 5 includes the cylinder part 6 and the cover part i,the twoparts being rigidly bolted together as indicated at 8'to form achamber 5 receiving the hollow cylindrical rotor 10.

The vehicle axle H is stationary and passes axially through the casing 5and the rotor Ill. The axle rotatably supports the hub l2 of a vehiclewheel. having the bore therein which receives the axle II is providedwith opposed recesses M receiving keymembers i Epiojecting axially fromthe wheel hub l2 whereby the rotor l and the wheel hub are lockedagainst relative rotary movement.

The rotor IE is provided with opposed radial slots l6 extending from thebore of the hub 13 to the periphery thereof and receiving slidableblades H. The outer extremities of the blades .11 move over the innersurface of the cylinder part 6 of the casing and the inner extremitiesthereof slide over the surface of the axle l l.

The rotor I0 is substantially concentric with the cylinder part of thecasing and the latter is enlarged at one side as indicated at I8 to forma valve chamber 19 communicating by passages 20 with the chamber 9.Intermediate the passages 20, a cam element 2| is rigidly mounted in Thehub portion [3 of the rotor the casing 5 and the opposed faces 22thereof are adapted to coact with the outer extremities of the blades llasthe rotor ill revolves. The portion of the axle ll disposed in radialalinement with the cam element 2| is formed with a recess 23 permittingthe inward movement of the blades ll when engaged and actuated by thesurfaces 22 of the cam 25. After the blades l! have been thrust inwardlyby the cam element 22, the inner extremities thereof moving over thecurved surface of the recess 23 will thrust outwardly against the innersurface of the cylinder part 5 and are maintained in engagementtherewith by the cylindrical surface of the axle H.

At the side of the casing 5 opposite the cam element 22 an inlet port 24is provided therein which communicates with a conduit 25. The outlet 2?for the fluid communicates with the valve chamber is and a slide valve28 is movable longitudinally in the latter between stops lt and isadapted; according to its adjustment, to close communication between oneor other of the-passages 2D and the outlet 21.

- The passage I9 is constituted by a bore formed in the enlargement l8and the ends thereof are closed by screw plugs 29 which, when removed,afford access to the chamber l9 and to the slide valve 28located thereinfor purposes of cleaning and adjustment.

The outlet port 2'! is connected with the return pipe 3|.

The control valve is designated generally at 32 and includes a casing 33having ports 34 and 35*therein adapted to communicate, respectively,with the conduits 25 and 3|. Two additional ports 36 and 31 are formedin the valve casing 33 and communicate by conduits 38 and 39,respectively, with a reservoir 40 containing a supply of oil or otherfluid to be used for producing the braking effect. A rotatable valvemember 4! having a stem 42 is rotatably mounted in the casing 33 and byadjustment thereof communication between the passages 34 and 36 and thepassages 35 and 31 may be regulated as desired.

It will be understood that the rotor I0 is fitted in a fluid-tightmanner at one side against the cover part '1 and at the other sideagainst the cylinder part 6, a gasket 43 being provided in the casingpart 6 to provide a fluid-tight joint between the latter and the hub l3of the rotor and the keys I5 of the Wheel hub I2.

In operation when the valve 33 is in the position of adjustmentillustrated in the drawing, open communication is established betweenthe reservoir 40 and the chamber 9 through one of the passages 20 and asthe rotor H] is rotated with the wheel hub E2 the fluid compressed bythe moving blades ll is discharged through the open passage Zil, chamberl9 and outlet port 21 to the return conduit 3| through which it isforced to the pasages 35 and 31 and through the conduit 39 to thereservoir 40. From the reservoir at the free circulation of the fluid iscompleted through the conduit 38, ports 36 and 34 and the conduit 25 tothe inlet port 24. Upon reversal of movement of the Wheel hub I2, theslide valve 28 is automatically moved toward the opposite end of chamberl9 by the fluid pressure so that circulation of the flow is through theother passage 20. By suitably adjusting the.

valve member it the areas of the ports 341 to 36 may be varied and theresistance to the flow of.

, stopped.

The invention may be used as a motor drive for vehicle wheels and inthis case motive fluid is supplied by a pipe connected with. one or theother end of the chamber IQ, both plugs 29 being removed and the pipes25 and 3! being closed by the valve M.

What I claim is:

l. A braking device comprising a cylinder element and a rotor element, awheel connected with one of said elements, an axle passing through thecylinder and rotor elements, blades slidable in said rotor and engagingthe inner surface of the cylinder, a valve controlled inlet port in thecylinder element, an outlet port in the cylinder element, a cam elementfixed with relation to the cylinder element and coacting with theblades, the inner ends of the blades having a sliding fit on the outersurface of the axle and the latter having a recess in the portionthereof opposite said cam element, said cylinder having passages onopposite sides of the cam element leading to the outlet port and valvemeans controlling communication between the passages and said outletport.

2. A braking device comprising a cylinder element and a rotor element, awheel connected with one of said elements, an axle passing through thecylinder and rotor'elements, blades slidable in said rotor and engagingthe inner surface of the cylinder, valve controlled inlet and outletports in the cylinder element, a chamber communicating with said outletport, plugs removably closing the terminals of said chamber, a camelement fixed in the cylinder element and slidable in said rotor andengaging the inner surface of the cylinder, valve controlled inlet andoutlet ports in the cylinder element, a chamber communicating with saidoutlet port, a cam element fixed in the cylinder element and coactingwith the blades of the rotor, said cylinder having passages at eitherside of the cam element communicating with said chamber, and

a freely movable valve means located in said chamber operated by fluidpressure in dependence on the direction of movement of the rotor andcontrolling communication between said passages and said outletport.

4. A brake device comprising a cylinder ele-' ment and a rotor element,a, Wheel connected with one of said elements, an axle passing throughthe rotor, blades movably'mounted in said rotor and engaging saidcylinder, said cylinder having inlet and outlet ports therein, a chamberin communication with one of said ports, said cylinder having passagescommunicating with the opposite extremities of said chamher, an abutmentin said cylinder located between said passages, and a freely movablevalve located in said chamber; and operated by fluid pressure forcontrolling communication between said passages and the portcommunicating with said chamber.

5. A brake device as claimed in claim 4 characterized by the provisionof means for limiting the movement of said valve means.

6. A braking device comprising a cylinder ele-' ment and a rotorelement, a wheel connected with one of said elements, an axle passingthrough the cylinder and rotor elements, blades slidable in said rotorand engaging the inner surface of the cylinder element, said cylinderelement having spaced ports therein, a cam element'located between saidports and adapted to engage and move the blades inwardly during rotationof the rotor element, said blades being engaged at their inner ends withsaid axle whereby they are maintained in engagement with. the innersurface of, the cylinder element throughout the major portion of therotary movement thereof, said axle having a recess adapted toaccommodate the' ends of said blades when the latter are moved inwardlyby said cam element.

WILLIAM FILLINGER.

